An issue was happening for a user of the Voice API where no audio could be heard in a custom IVR application.
- Vonage Voice API
Make sure the Application ID associated with the SIP Trunk is the same as the one used to generate the JWT (JSON Web Token) for the application.
- Also, make sure the correct region_url is being used in the application.
The application ID associated with the sip trunk was different than the one used to generate the JWT.